What are the molding methods of quality seamless elbow? Here is a brief introduction to everyone:
　　 Stamping method: The quality seamless elbow is used on the punching machine to expand the pipe end to the required size and form with a tapered core.

　　Forging method: In the production of quality seamless elbow, the end or part of the pipe is punched with a swaging machine to reduce the outer diameter. Common swaging machines include rotary, connecting rod, and roller types.
　　Rolling method: quality seamless elbow is usually made without a mandrel, which is suitable for the inner edge of the thick-walled tube. The core is placed in the tube, and the outer circumference is pushed by a roller for round edge processing.
Bulging method: In the production of quality seamless elbow, one is to place rubber in the tube, and the upper part is contracted with a punch to make the tube protrude into shape; the other is to hydraulically inflate the middle of the tube and fill the tube with liquid, and the pressure of the liquid to bulge the tube In the required form, most of the wave tubes are made in this way.
Bending method: There are three commonly used methods in the production of quality seamless elbow. One method is called the stretching method, the other is called the stamping method, and the third method of rollers has 3-4 rollers and two constant rollers. A regulating roller adjusts the constant roller distance, and the tube of the shaped article is bent.